Locating pip configurations outside of pip.conf

I am trying to modify pip (version 9) to exclusively retrieve python packages from my Artifactory server instead of pypi. my /etc/pip.conf file has only configurations to hit my Artifactory repository however when analyzing network packets I can see I am still retrieving packages from pypi.org running the

pip.conf

command shows only my /etc/pip.conf file is present. I have also checked for a hidden pip.conf file in my home directory. Is there any other configuration files pip reads from when retrieving Python packages that may be causing this behaviour?